Ch 3 Test Env Sci

Nitrogen is an essential component of amino acids and proteins.

• True

• False

Tags

NGSS.MS-LS1-2

Photosynthesis is a step in the global nitrogen cycle.

• True

• False

Tags

NGSS.MS-LS1-6

Water expands when it crystallizes and freezes.

• True

• False

Tags

NGSS.MS-PS1-4

Systems function in cycles and consist of _________ that increase a process or component, and __________ that diminish a process or component.

• positive feedbacks; negative feedbacks

• open systems; closed systems

• throughputs; thresholds

• positive feedbacks; open systems

• balances; imbalances

A/An _________ is all forms of a single element that differs in atomic mass.

• isotope

• atom

• molecule

• elementc14

  C

As the hydrogen ion [H+] concentration in a solution decreases, the hydroxide ion [OH−] concentration

• increases and the pH increases.

• increases and the pH decreases.

• decreases and the pH increases.

• decreases and the pH decreases.

• decreases and the pH stays the same.

Tags

NGSS.MS-PS1-2

Adding an acid to a solution _________ the pH, while adding a base _________ the pH.

• decrease; neutralize

• increases; decreases

• neutralize; increases

• decreases; increase

• decreases; neutralize

The damage to an ecosystem caused by a hurricane or flood can be referred to as

• an open system.

• an emergent property

• equilibrium in nature.

• a disturbance.

• negative feedback loop.

Tags

NGSS.MS-ESS3-2

Which of the following is not a molecule?

• O₃

• O₂

• C

• DNA

• H₂O

Tags

NGSS.MS-PS1-1

Which of the following statements would change this into a true statement: "Most, but not all, living organisms are made up of organic compounds"?

• All living organisms are made up of organic compounds.

• All living organisms are made up of inorganic compounds.

• Most, but not all, living organisms are made up of inorganic compounds.

• Most, but not all, living organisms are made up of organic elements.

• Most, but not all, living organisms are made up of inorganic elements.